JPS5818486B2 - How to build a vibration isolation wall - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method of constructing a vibration-proof wall underground using a muddy water excavation trench, and particularly to a method for constructing a vibration-proof wall in the ground using a muddy water excavation trench. This invention relates to a method of constructing a wall installed in the ground for vibration isolation.

Vibration caused by various machines, transportation, etc., propagates through structures or directly through the ground, causing vibrations in nearby areas.

It affects houses and facilities, causing mental or physical damage to residents, and like noise, it often becomes a social problem as a pollution.

Conventionally, in order to solve this problem, a trench was dug using muddy water near the vibration source, and a vibration isolating wall was constructed by filling the trench with vibration isolating material. There are examples of people trying to prevent the spread of the virus.

However, in this conventional example, since the vibration isolating material is inserted into a groove filled with muddy water, it takes time to insert the vibration isolating material due to the buoyancy of the muddy water, and there is no mortar between the groove wall and the vibration isolating material. Since the filling material is replaced with muddy water, the work is time-consuming and the workability is poor.

Therefore, an object of the present invention is to improve the workability of constructing a vibration isolation wall by inserting a vibration isolation material into a predetermined position in a trench without being affected by the buoyancy of muddy water in a muddy excavation trench. , a trench is excavated in the ground that is subjected to the vibration force while being filled with muddy water, and then a pair of plate-shaped bodies facing each other with a distance are inserted into the trench at a distance from the wall surface of the trench, and then, The muddy water between the plate-like bodies and the groove wall surface is solidified, and then the muddy water between the plate-like bodies is discharged to the outside of the groove, and a vibration isolating material is inserted between the plate-like bodies to form a barrier. Features a building hump.

The features of the invention will become clearer from the following description of the illustrated example.

First, as shown in Figure 1, the ground 10 is located between vibration sources such as transportation or construction sites and nearby houses and facilities.
Continuous groove 1 is filled with muddy water to prevent collapse of the hole plate.
2 to a predetermined depth.

It is desirable to excavate the groove 12 as close to the vibration source as possible.

Next, as shown in FIG.
The vibration isolator 14 is inserted at a distance from the center.

The vibration isolator 14 is maintained at a fixed position in the groove 1 by a support device (not shown) installed on the ground until the muddy water solidifies later.

The vibration isolators are inserted one after another depending on the depth and length of the groove 12.

The vibration isolator 14 is a pair of plate-shaped plates made of a vibration isolator 16 that has been formed into a plate shape in advance and has a density different from that of the ground 10, and a PC board, iron plate, etc. that is attached to sandwich the vibration isolator to reduce buoyancy. member 18.

As the vibration damping material 16, a polymer foam such as a polyurethane foam having a density of O, Ig/d, a sponge material, etc., which has a density lower than that of the ground 10, can be used.

The thickness of the vibration isolating material 16 is appropriately determined depending on the magnitude of the vibration force; for example, in the case of polyurethane foam, the thickness is 50 mm.
Confucian level is appropriate.

For example, a concrete plate having a density higher than the ground 10 may be used as the vibration isolator, but in this case, a concrete plate having a thickness larger than the vibration isolator 16 having a lower density is used.

When constructing the vibration isolator 14, as described above, the plate member 18 is attached to the vibration isolator 16. Since the G-mount and mounting use the plate member as a weight, it is possible to lower the vibration isolator 14 in muddy water without lifting it up.

The plate member 18 may be attached only to one side of the vibration isolator 16.

After inserting the vibration isolator 14, as shown in FIGS. 2 and 3, the muddy water between the vibration isolator and the groove wall 12a is solidified without being discharged to the outside of the groove 12.

This muddy water is solidified by adding a solidifying agent, for example, a solidifying agent whose main ingredients are glaze and water glass, to the muddy water in the groove 12 and stirring and mixing the muddy water.

In order to solidify the muddy water, the groove 12 may be excavated using so-called self-hardening muddy water that has been mixed with a solidifying agent in advance, and the muddy water may be solidified over time.

In addition, by replacing muddy water with hardening material, solidified material 20
may be formed.

The solidified muddy water 20 thus obtained constitutes an underground vibration isolation wall that is integrated with the vibration isolator 14, and protects the groove wall 12a, supports the vibration isolator 14, and defines the vibration isolator. Can be maintained in position.

Mud water solidification 20! is an impermeable solid that forms a continuous water-stop wall.

As another example of the vibration isolator, a concrete plate having an air layer formed by a plurality of hollow portions 22 inside may be used as shown in FIG.

Similarly, as shown in FIG. 5.6, a box 24 made of an open top or a concrete box 24 can be used as the vibration isolator 14.

In this case, as the muddy water around the box 24 solidifies, the box 24 may be filled with a vibration damping material 16' having a density different from that of the ground 10.

As the vibration isolating material 16', for example, polyurethane foam or sponge material molded into a columnar, spherical or rectangular shape can be used.

The above-mentioned examples are all easier to construct than conventional methods, but since the vibration isolating material is inserted into a groove filled with muddy water, the work of inserting the vibration isolating material is not affected by Masunaga's buoyancy. It's easy to accept.

In order to improve this and further enhance the workability, as shown in FIGS. 7 and 8, a pair of plate-like bodies 26 made of a PC board, a steel plate, etc. are installed inside the groove 12, and also from each other and from the groove wall 12a. After that, the plate-like body 26 and the groove wall 1.2a are inserted at intervals.
The muddy water between the plate-like bodies 26 is solidified, and the muddy water between the plate-like bodies 26 is then discharged to the outside of the groove 12, thereby forming a cavity between the plate-like bodies 26, and further 1. As shown in FIG. 9, the plate-shaped body 2
A vibration isolating material 16' is filled in the cavity 6 to complete the vibration isolating wall.

The drained mud water will be reused for subsequent trench excavation.

Vibration generated from the vibration source is blocked, absorbed or reflected by the constructed vibration isolation wall, thereby preventing the vibration from propagating through the ground and reaching nearby houses.

According to the present invention, the vibration isolating material is not inserted directly into the muddy water used for trench excavation, but is inserted into the space created by draining the muddy water from the insertion site in the trench, that is, between a pair of plate-shaped members. Therefore, it can be firmly and easily inserted into a predetermined position in the groove under the guidance of the pair of plate-shaped members, increasing the efficiency of vibration-proof wall construction, and ultimately reducing construction costs and shortening the construction period. be able to.

1. Furthermore, the present invention
Since the solidified material obtained by solidifying the muddy water constitutes a water-stop wall that covers the vibration isolator, - no special waterproofing treatment is required for the vibration isolator.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing a stage in which a vibration isolator is inserted into the groove after excavating the groove, and Figures 2 and 3 are longitudinal cross-sectional views showing stages in which muddy water around the vibration isolator is solidified, respectively. and a cross-sectional view, Figure 4 is a cross-sectional view of a vibration isolator with a hollow part, Figure 5
6 and 6 are longitudinal sectional views and cross sectional views, respectively, showing other examples of vibration isolators, and FIGS. 7 to 9 are sectional views showing examples of vibration isolating walls produced by the method of the present invention. 10...Ground, 12...Ditch, 14...
...Vibration isolator, 16, 16'...Vibration isolator, 1
8... Plate-shaped member, 20... Solidified mud, 24... Box, 26... Plate-shaped body.

Claims (1)

[Claims] 1. A trench is excavated in the ground that receives vibrational force while being filled with muddy water, and a pair of plate-shaped bodies are inserted into the groove at intervals from each other and from the groove wall, and between the plate-shaped bodies and the groove wall. A method for constructing a vibration isolation wall, the method comprising: solidifying the muddy water between the plate-shaped bodies, then discharging the muddy water between the plate-shaped bodies to the outside of the groove, and then inserting a vibration-proofing material between the plate-shaped bodies.